Home / 13,819.81-19,071.34-7,851.49

Finding the Fourth Proportional to 13,819.81, 19,071.34 and 7,851.49

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Solution

The fourth proportional to 13,819.81, 19,071.34 and 7,851.49 is: 10,835.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,819.81 : 19,071.34 = 7,851.49 : x
  2. Step 2: Convert to fraction form
    13,819.81/19,071.34 = 7,851.49/x
  3. Step 3: Cross multiply
    13,819.81x = 19,071.34 × 7,851.49
  4. Step 4: Simplify right side
    13,819.81x = 149,738,412.15
  5. Step 5: Solve for x
    x = 149,738,412.15/13,819.81
  6. Step 6: Final answer
    x = 10,835.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.